Roller side bearing.



J. F. O'CONNOR. ROLLER swE BEARING. v APPLICATION FILED Nov. 6, $915. I

Patented May 29, 1917.

INVENT aha r M. Y a E Q; m m

TED s 'rar nsix rrm o F JOHN F. o'cormon, or CHICAGO, armors, ASSIGNQR TO-WILLIAM MINER, or

(II-LAZY, NEW YORK.

ROLLER SIDE BEARING.

Specification of Letters Patent.

Patented May 29, 1917.

Application filed November 6, 1915. Serial No. 59,918.

To all whom it may concern.

Be it known that I, JOHN F. O CoNNo R, a citizen of the United States, residing-at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Roller Side Bearings, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming apart of this specification.

This invention relates to improvements in roller side bearings.

The object of-the invention is to provide a roller'side bearing for railway cars which is so arranged that the anti-frictionroller thereof cannot be overloaded. 1 i v I In the drawing forming a part of this specification, Figure 1 is a side elevation of portions of a car underfra-me and side bear:

ing bridge of a truck showing my improve-- ment in connection therewith. Fig. 2 is a top plan view, upon a larger scale, of the improved side bearing. Fig. 3 is an enlarged vertical, sectional view taken substantially on the line 33 of Fig. 1. Fig.4

is a horizontal, sectional view taken substantially on the line 44: of Fig. 1. And Fig. 5 is a bottom plan view of the bearing proper.

In said drawing, 10 denotes aportion of a car underframe which is located at the side thereof and opposite the center pin,

said member being provided with a side bearing wear plate 11, riveted tothe underside thereof and 12 indicates the side bearing bridge of usual form such as is employed with passenger car trucks. The .improved side, bearing designated generally by A, comprises two castings 1'313, which together form a relatively-fixed bearing memher having an upper horizontal bearing surface 14, adapted to cooperate with said wear plate 11 in the manner hereinafter described. Each of the castings 13 is holi. lowed out at the center as indicated at 15 and is provided with' adepending flange 16, said flanges 16'being bolted to the bridge 12 as by the bolts 17. Below the flanges 16, each of the castings 13 is formed with a semi-cylindric spring casing 18, said semicylindric casings 18 together forming an in closed spring casing for a heavy spring, comprised of an outer heavy coil 19 and an inner nested coil 20. Each of said castings 13 is provided with'a horizontal wall 21,

the latter having depending therefrom perforated ears 22 by which. the .parts are adapted to be bolted together .as by bolts '23 indicated in Figs. 1, 3 and. 5.- Said spring at its lower end rests-upon a follower 2-1 which straddle'the side bearing bridge '12.

and fit within and are guided by suitable offset portions 3l-31 of the depending flanges 16 of the castings 1313.'. Said arms -30, as clearly indicated inFig. 3, rest upon said upper follower 27. Said box- .like member 29 is also hollowed out at its upper end as indicated at 32, and has mounted therewithin an anti-friction roller 33, the latter being supported on a suitable journal 34: having its ends supported in the side walls of said box-like member 29.

As clearly appears from the drawing, the engaging portion of the anti-friction roller 33 is raised above the horizontal fixed bearing surface 14 so that the roller will be engaged by the wear plate 11 under all'n0rmal conditions. The spring is made of high capacity, approximately, 20,000 to 25,000 lbs. capacity and will support the roller in operative position under all normal'conditions and the roller will be adapted to automatically compensate for any wear on the parts and particularly the center hearing which permits the body frame to sag. In the event that the load becomes excessive it is apparent that the roller 33 will be depressed to a position flush with said fixed bearing surface 14, and conse-- quently the member 1313 will take all the load in excess of the predetermined capac- 'ity of the spring which supports the anti- This is an advantage since v friction roller. from their very nature side bearings employing anti-friction rollers are necessarily built of relatively light construction and not V which is adjustably supported aszby a plu- 1 adapted to withstand too great a load. With my arrangement, the anti-friction roller is permitted to withstand as great a load as its structure will permit and excessive loads are carried by the fixed bearing member 1313 which is well adapted to withstand any load desired.

I claim:

1. In a roller side bearing, the combination with a two part fixed bearing member adapted to be attached to a part of a truck, said member being provided with an upper horizontal bearing surface and recessed at the center and provided with a spring chamber at the bottom, of a hollow box-like member slidably mounted within said first named member, a spring for yieldingly supportingsaid hollow box-like member, and an antifriction roller carried by said box-like member the engaging surface of said roller being normally above said fixed bearing surface, and means for adjusting the tension of. said spring.

2. In a device of the character described,

y the combination with a side bearing bridge of a truck, of a hollow bearing member mounted on said bridge and havlng portions extending above, below and at the sides thereof, said bearing member having an upper horizontal surface, a second hollow member slidably mounted within said first named member and having depending arms straddling said bridge, a spring located beneath the bridge and mounted within the lower portion of the first named member said spring normally maintaining the second named member in its uppermost position, and an anti-friction roller carried by the second named member.

3. In a device of the character described, the combination with the side bearing bridge of a truck of a hollow bearing member mounted on said bridge and having portions located above and below said bridge, an anti-friction roller, a member Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G. 

